A variety of seismic testing techniques rely on the use of seismic sources, detectors, or both, placed at some depth below the ground surface; these are often installed within fluid-filled boreholes. The interpretation of the records obtained in the course of such explorations requires a thorough understanding of how waves propagate in the borehole and its immediate vicinity. Depending on the d...

Mapping multiple unknown terrestrial signals of opportunity (SOP) transmitters via multiple collaborating receivers is considered. The receivers are assumed to have knowledge about their own states, make pseudorange observations on multiple unknown SOPs, and fuse these pseudoranges through a central estimator. Two problems are considered. The first problem assumes multiple receivers with random...

Recently many studies have been done on different issues of using multiple antennas at transmit and receive sides of a radar system in a MIMO (Multiple Input Multiple Output) configuration. In addition, for the purpose of electronic warfare, the utilization of available signals of the environment to detect the targets has gained considerable attention in recent years. Such passive radars use th...

Thanks to their quick placement and high flexibility, unmanned aerial vehicles (UAVs) can be very useful in the current future wireless communication systems. With a growing number of smart devices infrastructure-free networks, it is necessary legitimately monitor these networks prevent crimes. In this paper, novel framework proposed exploit flexibility UAV for legitimate monitoring via joint t...

BACKGROUND Public health research on sedentary behavior (SB) in youth has heavily relied on accelerometers. However, it has been limited by the lack of consensus on the most accurate accelerometer cut-points as well as by unknown effects caused by accelerometer position (wrist vs. hip) and output (single axis vs. multiple axes). The present study systematically evaluates classification accuracy...

Recently, reconfigurable intelligent surfaces (RIS) have attracted a lot of attention due to their capability extending cell coverage by reflecting signals toward the receiver. In this letter, we analyze downlink RIS-assisted network with one base station (BS) and user equipment (UE). Since RIS orientation horizontal distance between BS significant influence on coverage, formulate an placement ...

many real world problems can be modelled as an optimization problem. evolutionary algorithms are used to solve these problems. ant colony algorithm is a class of evolutionary algorithms that have been inspired of some specific ants looking for food in the nature. these ants leave trail pheromone on the ground to mark good ways that can be followed by other members of the group. ant colony optim...

The use of real-time software-controlled reconfigurable intelligent surface (RIS) units is proposed to increase the reliability vehicle-to-everything (V2X) communications. optimum placement problem RIS formulated by considering their sizes and operating modes. solution given, where it shown that optimal depends on locations transmitter receiver. RIS-supported highway deployment can combat high ...

A 910MHz high efficiency RF transceiver for Wireless Body Area Network in medical application is presented in this paper. High energy efficiency transmitter and receiver architectures are proposed. In wireless body sensor network, the transmitter must have higher efficiency compared with the receiver because a large amount of data is sent from sensor node to receiver of the base station and sma...